Radio loud-speaker assembly



March 27, 1928" 1,664,241 R. H. BRYANT RADIO Low SPEAKER ASSEMBLY Filed June so, 1923 INVENTOR. Roger H. Bryant WNW ATTORNEY Patented Mar. 27,1928.

UNITED STATES PATENT OFFICE.

ROGER H. BRYANT, OI 'WIL KINSIBURG,

A CORPORATION OF PENNSYLVANIA.

RADIO LOUD-SPEAKER ASSEMBLY.

Application filed June 30, 1923. Serial No. 648,657.

My invention relates to loud speaking tele-,

phones such as are particularly adapted to radio reception.

Regarded broadly, the object of my invention is to provide a convenient mounting for such a telephone.

More specifically stated, the object of my invention is to adapt. an ordinary metallic base or housing, such as is frequently used in connection with motor-driven fans, to

house and support a loud speaker.

Another objectof my invention is to protect the table or other supporting surface from any roughness on the bottom plate of the instrument in order that scratches are prevented and that no unevenness on said plate shall resultin oscillation of the instrument. Such oscillation, if it ha pened to respond in period to some note oft e tele- -phone, might result in unpleasant reinforcement of that note. I 1 7 These and other objects and details of construction will be made more apparent by reference to the accompanying drawings,

wherein Figure 1 is an elevation of the device as a whole.

2 is a view in enlarged central vertical section through the lower portion of the ac device. I

- Fig. 3 is a view in section upon the line 111-111 of Fig. 2 with the horn removed. The device includes an electromagnetic sound producer which is not disclosed in detail in this application since the invention covered hereby is not dependent upon the form of the electromagnetic mechanism used for operating the diaphragm. nism is enclosed in a casing 5, the cover 6 of which is provlded with a'boss 7 that is.

internally threaded to receive a connecting sleeve 8. At the bottom of the casing 5 is another boss 9 which surrounds the entrance for conductors 11 by which the electromagnetic mechanism iss'supplied. The boss 9 does not extend into contact with the base 12 of the device, but the casing 5 and the mechanism within it are supported wholly through the connecting sleeve 8.

The casing 5 with its enclosed mechanism is inside of a housing 13. This housing is made of any desired form but convenience of manufacture is afforded by using for this This mechahousing a sheet metal body such as has heretofore been employed to form the base for electric fans. The housing is circular in horizontal cross section. In vertical cross sectlon, its shape presents a double curvature so that the lower part, acting like a dome, enables it to carry a very considerable weight while its upper part constitutes an approximately conical portion which is well adapted to receive the thrust of such weight and to transmit the thrust to the dome-shape portion. The housing, therefore, is well adapted to support the weightof the electromag-' netic mechanism. 7

At one point, the housing 13 is provided with an opening 14, protected by the usual insulating sleeve, to accommodate the conductors 11. At its upper end, the housing engages a shoulder 15 upon the connector 8. Preferably, the size of'this connector is such that its beveled surface 37 fits the mouth of the conical portion of the housing 13 closely, so that, by the time it has been forced into place until the shoulder 15' contacts the edge of the housing, a firm engagement between the connector and the housing is afforded. Below the beveled surface 37, the connector has a skirt portion 38 which may be pressed outward against the housing, adding This pressing operation is performed before thecasing 5 is in place.

At its lower end, the ed as shown threads. upon the connector tacting with the upper edge of the boss 7 insures a firm engagement between the cover 6 and the connector. A central passage 20 extends through the connector 8 and serves to permit the sound to emerge into the horn 21. a a

This horn is made of fibre or any other connector 8 is threadat 17, to co-operate with the the inside of the boss 7. Also suitable material, preferably non-metallic.

At its lower end, it is reinforced by a collar 23. Integral with this collar, or fastened thereto in any desired manner, is a thin metal sleeve 22 which flares upward at the same rate as the horn 21 and at its upper edge is flush with the inner surface thereof. The outer surface of the sleeve 22 is provided with ridges 39 or other suitable projections by means of which a firm joint bethe outside of to the firmness of the joint.

has a shoulder 18, which, contween the metal ciently loose to enable one to and the remainder of the horn is'secured. The parts 22 and 21 are united in any desired way. For example, the non-metallic part may be molded about the metallic part.

The collar 23 fits the opening at the top of the connector 8 and is seated against the interior shoulder 41 therein. The fit between the connector 8 and the collar 23 is sulfiinsert the ho n or remove it without the use of tools while at the same time, it is sufliciently tight to prevent any leakage of air which would diminisli the tone quantity. In order to fasten the horn to the connector, a set screw 24 is provided which extends through the upper part of the housing 13 and through a thick part of the connector 8, and bears against the insert'22. Since this set screw passes through a considerable thickness, an abundant bearing is allorded for its threads whereby it presses against the horn with suflicient force to ensure a firm fastening. The reinforcement of the lower end of the horn by the collar 23 enables it to sustain the pressure of the screw 24:.

The housing -13 rests upon the base plate 12. A covering of felt or other non-elastic material 26 extends over the whole under surface of the base 12 and is carried around the upturned outer edge 27 of the base and down on the inside of this edge. It is there fastened in place by means of a spring wire ring 28. The lugs 31 afford bearings for screws 32 which pass through holes provided em in an annular flange 33 upon the bottom of the housing 13. This flange is provided with additional holes 34 which register with holes 35 in the base 12. These holes serve for the passage of screws or other fastening devices by means of which the instrument may be secured to a table, the

Wall, or other "support.

use, the instrument may .upon a table or other horizontal support, or

In the operation of the device, sounds produced by the mechanism within the casing 5 pass up the bore 20 of the connector 8 and emerge through jghe horn 21. The secure fastening of the cover '6 to the connector 8 and of the connector 8 to the housing 13 and to the horn 21 make the Whole device a wellunited whole. For transportation or packing, the horn 21 is readily removed by loosening the screw 24 and when reinserted in setting the instrument up for use, is quickly fastened again by tightening the screw. In be loosely seated fastened by screws through the holes 34 to either a horizontal such as a wall.

While I have illustrated but one embodiment of my invention it will be apparent to those skilled in the art that various chan es and modifications may be made without departing from the spirit and scope of my invention, as set forth in the appended claims.

claim as my invention:

1. In a loud-speaking telephone, an electromagnetic sounding device, a casing covering said device and having an opening at the top, a boss surrounding said opening, a connector threaded into said boss, said connector having a bore connnunicating with said opening, a shoulder in said bore and a shoulder on the exterior of the connector, :1 housing secured to the connector in engagement with said exterior shoulder and a. horn detachably secured in said bore in engagement with the shoulder therein.

2. In a loud speaking telephone, a horn holder, a base, a sheet material housing mounted on said base, a hollow connector, a shoulder on said connector engaging the upper edge of the housing, fastening means securing said connector to the housing, a shoulder on the interior of said connector, a weight secured to the lower end of said connector and a set screw extending through said housing and connector in the same plane as said fastening means.

3. A. connector having a shoulder, a portion of said connector adjacent to said shoulder being adapted to fit the mouth of a hollow member and a skirt portion on the side of said connector opposite to said shoulder being adapted to be pressed outwardly to atford a firm joint between said connector and said hollow member.

4. In a loud speaking telephone, a hollow housing-member having a mouth opening, a hollow connector-device supported in said opening and extending into the interior of said housing member, one end of said connector-device being adapted to support a horn and the other end thereof being provided with means whereby a sound producing device may be affixed thereto, and a deformable skirt carried exteriorly of said 0011- nector device, said skirt being pressed out- Wardly to make contact with the interior of said mouth-opening, whereby withdrawal of said connector-device is prevented.

In testimony whereof, I have hereunto subscribed my name this 27th day of June,

ROGER H. BRYANT.

or a vertical support, 

